Threshing-machine cylinder.



A. M. MASON. THRESHING MACHINE CYLINDER.

APPLICATION FILED APR-8. I9I8.

Patented May 6, 1919.

ALVIN M. MASON, OF BOZEMAN, MONTANA.

THRESHINGr-MACHINE CYLINDER.

Application filed April 8, 1918.

To all whom it may concern:

Be it known that I, ALVIN M. Mason, a citizen of the United States, residing at Bozeman, in the county of Gallatin and. State of Montana, have invented certain new and useful Improvements in Threshing-Machine Cylinders, of which the following is a specification.

The invention relates to improvements in threshing machine cylinders, and more particularly to means for fixedly securing or looking the toothed cylinder bars to the opposite heads of the cylinders to insure against side and rotary movement or other displacement of the bars and to maintain the same in proper rigid relation to the cylinder.

The broad object in view is the provision of improved means of the foregoing character embodying novel features of construction, comprising a minimum of parts with the consequent simplicity, possessing the utmost strength and rigidity, and allowing for independent removal and replacement of the cylinder bars with ease and rapidity.

The invention further resides in the novel construction, arrangement, and combination of parts as will be hereinafter fully pointed out and described in connection with the accompanying drawings, in which Figure 1 is a view in elevation of a fragment of the annular peripheral end plate of a cylinder head, the plate being shown as provided with a socket in which is mounted or inserted in locked relation a segmental and integral bar lock member constructed in accordance with the invention.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 is a fragmental lengthwise view of a cylinder cross-bar removed from the cylinder and provided with the bar locking element of the invention.

More specifically described, the invention as illustrated resides in providing the peripheral bar supporting plate 1 of the opposite ends of a threshing machine cylinder of the required size and proportions, with a transverse, circular and segmental or interrupted slot formed with an inwardly protruding flat faced abutment or stop 2, the contour of the circular slot being described as a portion of a true circle. Said stop 2 extends from the face of the plate 1 at an angle into the slot and from one edge of the slot, as shown. A curvilinear cam-like groove 3 Specification of Letters Patent.

Patented May 6, it dtl. Serial No. 227,311,

in the inner face of the slot extends from the opposite edge of the slot where the groove has its maximum depth, in a curve to effect gradual merging of the groove with the circular face of the slot. The opposed faces or side walls of the groove converge gradually from the edge of the slot so as to provide both a wedge-like and a cam-like groove. The slot and groove so formed is adapted to receive to fit tightly therein a bar locking member a which is preferably formed integral with the end of the bar and in right angular relation thereto. The member is formed with a flat upper face portion 5 flush with the corresponding face of the cross-bar, and with a circular portion 5 adapted to fit accurately into the circular portion of the slot in the plate 1, while a flattened face 6 is provided which extends from the upper face portion 5 to interrupt the circular portion 5. A wedge-like tongue 7 projects from the circular portion 5 being formed with a curved face 8 which gradually merges with the portion or face 5 from the upper face portion 5, and with converging or tapering side faces 9. the convergence being from the upper face portion 5. The member 4 is positioned in the slot and groove of the plate 1 by imparting a r0- tary movement thereto which will serve to wedge the tongue 7 into the groove 3, continued rotary movement being limited by the stop or abutment 2 of the slot. The teeth 10 or the bar provide a gripping and leverage means in wedging the members in place.

Having described my invention, I claim 1. A device of the character described consisting of a supporting member provided with a transverse slot or recess, said slot or recess being formed with a circularly curved face extending from one upper edge of the slot and terminating at a point where the same meets the flat face of an abutment or stop, the latter extending inwardly from the remaining upper edge of the slot, a curvilinear and wedge-like groove in said curved face; and a bar locking member formed and proportioned to fit into said slot, said member having a circularly curved face adapted to engage the curved face of the slot, a flattened face adapted to engage the abutment or stop of the slot, and a wedgelike annular tongue projecting from the curved face of the locking member and curving to merge With the curved face and adapted to engage the groove of the slot.

2. The combination With a recessed support of a detachable tooth bar having a rounded face to turn in the recessed support and a friction member to engage the support and lock the bar, and an abutment on the support and a fiat face on the bar to engage the abutment to limit the turning movement 10 of the bar.

In testimony whereof I affix my signature.

ALVIN M. MASON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

